Ziemięcin [ʑɛˈmjɛnt͡ɕin] is a village in the administrative district of Gmina Błędów, within Grójec County, Masovian Voivodeship, in east-central Poland. It lies approximately 7 kilometres (4 mi) north of Błędów, 14 km (9 mi) west of Grójec, and 48 km (30 mi) south-west of Warsaw.